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A novel method for prediction of dynamic smiling expressions after orthodontic treatment: a case report

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  • Fanfan Dai
  • Yangjing Li
  • Gui Chen
  • Si Chen
  • Tianmin Xu

Abstract

Smile esthetics has become increasingly important for orthodontic patients, thus prediction of post-treatment smile is necessary for a perfect treatment plan. In this study, with a combination of three-dimensional craniofacial data from the cone beam computed tomography and color-encoded structured light system, a novel method for smile prediction was proposed based on facial expression transfer, in which dynamic facial expression was interpreted as a matrix of facial depth changes. Data extracted from the pre-treatment smile expression record were applied to the post-treatment static model to realize expression transfer. Therefore smile esthetics of the patient after treatment could be evaluated in pre-treatment planning procedure. The positive and negative mean values of error for prediction accuracy were 0.9 and − 1.1 mm respectively, with the standard deviation of ± 1.5 mm, which is clinically acceptable. Further studies would be conducted to reduce the prediction error from both the static and dynamic sides as well as to explore automatically combined prediction from the two sides.

Suggested Citation

  • Fanfan Dai & Yangjing Li & Gui Chen & Si Chen & Tianmin Xu, 2016. "A novel method for prediction of dynamic smiling expressions after orthodontic treatment: a case report," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 19(3), pages 340-346, February.
    • Handle: RePEc:taf:gcmbxx:v:19:y:2016:i:3:p:340-346
    DOI: 10.1080/10255842.2015.1025767
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